CN113523607B - Optical temperature control device, laser cutting head and laser processing method - Google Patents
Optical temperature control device, laser cutting head and laser processing method Download PDFInfo
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- CN113523607B CN113523607B CN202110891354.XA CN202110891354A CN113523607B CN 113523607 B CN113523607 B CN 113523607B CN 202110891354 A CN202110891354 A CN 202110891354A CN 113523607 B CN113523607 B CN 113523607B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
- B23K26/703—Cooling arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model discloses an optical temperature control device of a laser cutting head, the laser cutting head and a laser processing method, wherein the laser cutting head comprises a machine body, a collimating lens and a focusing lens, wherein the collimating lens and the focusing lens are arranged in the machine body, the optical temperature control device comprises a first electronic cooling ring and a second electronic cooling ring which are arranged in the machine body, two axial ends of the first electronic cooling ring and the second electronic cooling ring are respectively a cold end and a hot end, and the cold ends of the first electronic cooling ring and the second electronic cooling ring respectively abut against one ends of the collimating lens and the focusing lens. The utility model has the beneficial effects that: the first electronic cooling ring and the second electronic cooling ring are directly abutted against the optical lens, the cold end of the first electronic cooling ring and the second electronic cooling ring can absorb a large amount of heat, the cooling efficiency is high, the optical lens is cooled in a relatively closed environment, the risk of polluting the lens is avoided, the temperature can be subjected to closed-loop management, the temperature control effect is good, the stability of laser processing is improved, and the quality of a product is improved.
Description
Technical Field
The utility model relates to the technical field of laser processing, in particular to a laser cutting head with an optical temperature control device and a laser processing method.
Background
The laser cutting is to irradiate the material to be cut with high power density laser beam to heat the material to vaporization temperature or smelting temperature to form holes, and the holes form slits with narrow width continuously with the movement of the laser beam to cut the material.
The high power of fiber laser is rapidly developing, 6kw,12kw,20kw,30kw … …, and the laser is rapidly developing toward high power, but the higher the power of laser, the higher the optical cooling requirement of the laser cutting head, the more closely the temperature of the optical lens and the cutting focus, and the position of the focus will change with the change of temperature due to the lens thermal effect, as shown in fig. 1 below, in the mass production of full power, the temperature of the lens will affect the stability of the cutting process, thereby affecting the quality of the product.
At present, three cooling modes of an optical lens of a laser cutting head are mainly adopted:
1. indirect cooling by a water cooling mode: the objective of the optical lens is realized by cooling the lens group of the lens, the cooling mode has low cooling efficiency, the closed loop management of the temperature of the lens cannot be carried out, the temperature diagram of the optical lens adopting the water cooling mode is shown in the following figure 2, and the high and uneven temperature of the optical lens can be seen;
2. direct cooling of air cooling mode: the cooling efficiency is not high by directly blowing the flowing air on the surface of the lens, the requirement on the cleanliness of the air is high, the risk of lens pollution is caused, and in addition, the closed-loop management of the temperature of the lens cannot be performed;
3. and (3) naturally cooling: the absorption of the lens to the laser light is performed by heat conduction of the optical material, but most of the optical lenses are made of quartz material, and the heat conduction degree of the quartz material is 0.014K, and the heat conduction efficiency of the optical lenses is low.
In the prior art, chinese patent No. 212470175U discloses a cooling device for an inner cavity of a laser processing head body, which comprises a semiconductor refrigerating sheet, a vacuum pressure pump, a gas filter, a first heat exchange block, a second heat exchange block and a connecting pipeline, wherein the semiconductor refrigerating sheet is respectively connected with the first heat exchange block and the second heat exchange block, an inlet of the gas filter is connected with an outlet of the vacuum pressure pump through the pipeline, and an inlet of the vacuum pump is connected with the inner cavity of the laser processing head body.
Disclosure of Invention
In order to solve the technical problems, one of the objectives of the present utility model is to provide an optical temperature control device for a laser cutting head, which includes a first electronic cooling ring and a second electronic cooling ring, and the optical temperature control device for the laser cutting head has the advantages of direct interference with an optical lens, high cooling efficiency, lens pollution prevention, closed-loop management of temperature, high processing stability, and product quality improvement.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
an optical temperature control device of a laser cutting head comprises a machine body, wherein a light through hole for laser to pass through is formed in the machine body, and a collimating lens and a focusing lens which are arranged at intervals are sequentially arranged in the machine body along the emitting direction of the laser;
the optical temperature control device comprises a first electronic cooling ring and a second electronic cooling ring which are arranged in the machine body, wherein the two ends of the first electronic cooling ring and the second electronic cooling ring along the axial direction are respectively a cold end and a hot end, the cold end of the first electronic cooling ring is abutted against one end of the collimating lens, and the cold end of the second electronic cooling ring is abutted against one end of the focusing lens.
Preferably, both ends of the first electronic cooling ring and the second electronic cooling ring are respectively set to be planes, both ends of the collimating lens and the focusing lens are respectively set to be plane ends and arc-surface ends, the cold end of the first electronic cooling ring is abutted against the plane ends of the collimating lens, and the cold end of the second electronic cooling ring is abutted against the plane ends of the focusing lens, so that on one hand, both ends of the first electronic cooling ring and the second electronic cooling ring are respectively set to be planes, and the processing and the assembly of the first electronic cooling ring and the second electronic cooling ring are facilitated; on the other hand, the cold ends of the first electronic cooling ring and the second electronic cooling ring are respectively abutted against the plane ends of the collimating lens and the focusing lens, so that the contact areas of the first electronic cooling ring and the second electronic cooling ring with the collimating lens and the focusing lens are increased, and the cooling efficiency of the collimating lens and the focusing lens is further improved.
Preferably, the plane end of the collimating lens is arranged at one end deviating from the focusing lens, and the plane end of the focusing lens is arranged at one end deviating from the collimating lens, so that the influence of the hot ends of the first electronic cooling ring and the second electronic cooling ring on the focusing lens and the collimating lens is avoided, and the cooling effect of the first electronic cooling ring and the second electronic cooling ring on the collimating lens and the focusing lens is ensured; if the plane end of the collimating lens is arranged at one end facing the focusing lens, and the plane end of the focusing lens is arranged at one end facing the collimating lens, after the assembly according to the structure, the hot end of the first electronic cooling ring faces the focusing lens, the heat emitted by the hot end of the first electronic cooling ring can influence the temperature of the focusing lens, the hot end of the second electronic cooling ring faces the collimating lens, and the heat emitted by the second electronic cooling ring can influence the temperature of the collimating lens.
Preferably, an installation cavity is formed in the machine body, the first electronic cooling ring, the collimating lens, the focusing lens and the second electronic cooling ring are sequentially arranged in the installation cavity along the outgoing direction of laser, the outer diameters of the first electronic cooling ring and the second electronic cooling ring are equal to the inner diameter of the installation cavity, the inner diameters of the first electronic cooling ring and the second electronic cooling ring are equal to the diameter of the light-passing hole, positioning rings are arranged at the cambered surface ends of the collimating lens and the focusing lens, the first electronic cooling ring, the collimating lens, the focusing lens and the second electronic cooling ring are embedded in the installation cavity, assembly is facilitated, the outer diameters of the first electronic cooling ring and the second electronic cooling ring are equal to the inner diameter of the installation cavity, the inner diameters of the first electronic cooling ring and the second electronic cooling ring are equal to the diameter of the light-passing hole, and the first electronic cooling ring and the second electronic cooling ring are further abutted to the second electronic cooling ring and the focusing lens under the premise of not affecting assembly and laser light-emitting increase.
Preferably, the first electronic cooling ring and the second electronic cooling ring respectively comprise an external power switch, a temperature regulator and an internal electronic quick cooling module, the power switch is connected with an external power supply through an AC power line, the power switch is connected with the electronic quick cooling module through a DC power line, the electronic quick cooling module is connected with the temperature regulator through a temperature sensor, the temperature regulator is connected with the power switch through a regulator wiring, two axial ends of the electronic quick cooling module are respectively a cold end and a hot end, the collimating lens, the focusing lens and the corresponding cold ends of the electronic quick cooling module are in contact with each other, through the arrangement, the external power supply provides alternating current through the AC power line, the alternating current passes through the rectification function of the power switch, and the temperature regulator is used for providing the set value direct current for the electronic quick cooling module under the regulation function of the power switch, the temperature of the electronic quick cooling module is reduced along one axial end to form a cold end, the temperature of the electronic quick cooling module is connected with the power switch through a regulator wiring, the temperature of the other axial end is in the temperature regulator, and the temperature regulator is fed back to the electronic quick cooling module through the temperature regulator after the temperature regulator, thereby the temperature regulator is subjected to the real-time temperature regulation.
Preferably, the electronic quick cooling module comprises a ceramic shell, an N-type semiconductor and a P-type semiconductor are arranged in the ceramic shell, a first copper electrode is arranged at one end of the N-type semiconductor and one end of the P-type semiconductor, two ends of the first copper electrode are respectively connected with one end of the N-type semiconductor and one end of the P-type semiconductor, a second copper electrode and a third copper electrode are respectively arranged at the other ends of the N-type semiconductor and the P-type semiconductor, the power switch is electrically connected with the second copper electrode and the third copper electrode through the DC power wire, and through the arrangement, the ceramic shell is good in heat transfer effect and non-conductive, after the power is turned on, an electron hole pair is generated near the first copper electrode, internal energy is reduced, temperature is reduced, heat is absorbed to the outside, a cold end is formed, the electron hole pair of the second copper electrode and the third copper electrode is compounded, internal energy is increased, temperature is increased, and heat is released to the outside, and the electronic quick cooling module is formed.
Preferably, the machine body is provided with a first water cooling cavity and a second water cooling cavity at the hot ends of the first electronic cooling ring and the second electronic cooling ring, the first water cooling cavity and the second water cooling cavity are annular, the first water cooling cavity and the second water cooling cavity are provided with a water inlet and a water outlet, and through the arrangement, the first water cooling cavity and the second water cooling cavity respectively conduct heat dissipation and cooling on the hot ends of the first electronic cooling ring and the second electronic cooling ring, and heat of the hot ends of the first electronic cooling ring and the second electronic cooling ring is taken away.
The second objective of the present utility model is to provide a laser cutting head, which includes the above optical temperature control device.
A third object of the present utility model is to provide a laser processing method for processing by using the laser cutting head, the laser processing method comprising the steps of:
step 1: setting working parameters of the first electronic cooling ring and the second electronic cooling ring according to the temperature of the optical lens to be controlled;
step 2: starting the laser cutting head for processing;
step 3: and stopping the laser cutting head after the machining is finished.
Preferably, in step 1, when the temperature of the optical lens to be controlled is T and the currents of the first and second electron cooling rings are set to be I, the currents of the first and second electron cooling rings are adjusted according to the following relationship:
Compared with the prior art, the utility model has the beneficial technical effects that:
after the optical temperature control device is adopted, the cold ends of the first electronic cooling ring and the second electronic cooling ring are directly abutted against the collimating lens and the focusing lens respectively, namely directly abutted against the optical lens, the cold ends of the first electronic cooling ring and the second electronic cooling ring can absorb a large amount of heat, the cooling efficiency is high, the optical lens is cooled in a relatively closed environment, the risk of polluting the lens is avoided, the first electronic cooling ring and the second electronic cooling ring can carry out closed-loop management on the temperature, the temperature control effect is better, the stability of laser processing is improved, and the quality of products is improved.
Drawings
FIG. 1 is a schematic diagram showing the relationship between the temperature change and the focal position change of an optical lens in the background art;
FIG. 2 is a schematic diagram showing the temperature of an optical lens in a water-cooling mode according to the background art;
FIG. 3 is a schematic diagram showing the relationship between the temperature change and the focus change of an electronic cooling optical lens according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram showing the temperature of an optical lens with electronic cooling according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of an embodiment of an optical temperature control device and housing assembly;
FIG. 6 is a schematic view of an electronic cooling ring according to an embodiment of the present utility model;
FIG. 7 is a schematic diagram of the working principle of an electronic quick cooling module according to an embodiment of the present utility model;
FIG. 8 is a graph showing the relationship between the current of the electronic cooling ring and the temperature of the optical lens according to the embodiment of the present utility model.
Wherein, the technical characteristics that each reference sign indicates are as follows:
1. a body; 2. a collimating optic; 3. a focusing lens; 4. a first electron cooling ring; 5. a second electron cooling ring; 11. a light-transmitting hole; 12. a mounting cavity; 13. a first water cooling cavity; 14. a second water cooling cavity; 51. an electronic quick cooling module; 52. a power switch; 53. a temperature regulator; 54. an AC power cord; 55. a DC power line; 56. a temperature sensor; 57. regulator wiring; 510. a ceramic shell; 511. a first copper electrode; 512. a second copper electrode; 513. a third copper electrode; 514. an N-type semiconductor; 515. and a P-type semiconductor.
Detailed Description
The present utility model will be further described in detail with reference to the following examples, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, but the scope of the present utility model is not limited to the following specific examples.
Referring to fig. 3-8, the present embodiment discloses an optical temperature control device of a laser cutting head, the laser cutting head includes a machine body 1, a light-passing hole 11 for passing laser is provided in the machine body 1, and a collimating lens 2 and a focusing lens 3 are sequentially provided in the machine body 1 along the emitting direction of the laser at intervals;
the optical temperature control device comprises a first electronic cooling ring 4 and a second electronic cooling ring 5 which are arranged in the machine body 1, wherein two ends of the first electronic cooling ring 4 and the second electronic cooling ring 5 along the axial direction are respectively a cold end and a hot end, the cold end of the first electronic cooling ring 4 is abutted against one end of the collimating lens 2, and the cold end of the second electronic cooling ring 5 is abutted against one end of the focusing lens 3.
After the optical temperature control device is adopted, the cold ends of the first electronic cooling ring 4 and the second electronic cooling ring 5 are directly abutted against the collimating lens 2 and the focusing lens 3 respectively, namely, are directly abutted against the optical lens, the cold ends can absorb a large amount of heat, the cooling efficiency is high, the optical lens is cooled in a relatively closed environment, the risk of polluting the lens is avoided, the first electronic cooling ring 4 and the second electronic cooling ring 5 can carry out closed-loop management on the temperature, the temperature control effect is better, the relationship diagram of the temperature change and the focus change of the optical lens after the optical lens is cooled by adopting the first electronic cooling ring 4 and the second electronic cooling ring 5 is shown as the following figure 3, the temperature change of the optical lens is small, in the embodiment, the temperature of the optical lens is controlled to be between 35 ℃ and 40 ℃, the focus position change is small, the temperature diagram of the optical lens is shown as the following figure 4, the temperature of the optical lens is low and uniform, and therefore the processing stability of laser is improved, and the quality of a product is improved.
The two ends of the first electronic cooling ring 4 and the second electronic cooling ring 5 are respectively set to be planes, the two ends of the collimating lens 2 and the focusing lens 3 are respectively a plane end and a cambered surface end, the cold end of the first electronic cooling ring 4 is abutted against the plane end of the collimating lens 2, and the cold end of the second electronic cooling ring 5 is abutted against the plane end of the focusing lens 3, on one hand, the two ends of the first electronic cooling ring 4 and the second electronic cooling ring 5 are respectively set to be planes, so that the first electronic cooling ring 4 and the second electronic cooling ring 5 can be conveniently processed and assembled; on the other hand, the cold ends of the first electronic cooling ring and the second electronic cooling ring 5 respectively collide with the plane ends of the collimating lens 2 and the focusing lens 3, so that the contact areas of the first electronic cooling ring 4 and the second electronic cooling ring 5 respectively with the collimating lens 2 and the focusing lens 3 are increased, and the cooling efficiency of the collimating lens 2 and the focusing lens 3 is further improved.
The plane end of the collimating lens 2 is arranged at one end deviating from the focusing lens 3, the plane end of the focusing lens 3 is arranged at one end deviating from the collimating lens 2, the hot ends of the first electronic cooling ring 4 and the second electronic cooling ring 5 are prevented from affecting the focusing lens 3 and the collimating lens 2 respectively, and the cooling effect of the first electronic cooling ring 4 and the second electronic cooling ring 5 on the collimating lens 2 and the focusing lens 3 is ensured; if the plane end of the collimating lens 2 is disposed at one end facing the focusing lens 3, and the plane end of the focusing lens 3 is disposed at one end facing the collimating lens 2, after the assembly according to the above structure, the hot end of the first electronic cooling ring 4 faces the focusing lens 3, the heat emitted by the hot end of the first electronic cooling ring 4 will affect the temperature of the focusing lens 3, the hot end of the second electronic cooling ring 5 faces the collimating lens 2, and the heat emitted by the second electronic cooling ring 5 will affect the temperature of the collimating lens 2.
The machine body 1 is internally provided with a mounting cavity 12, the mounting cavity 12 is cylindrical, the inner diameter of the mounting cavity 12 is larger than the inner diameter of the light through hole 11, the mounting cavity 12 is internally provided with a first electronic cooling ring 4, a collimating lens 2, a focusing lens 3 and a second electronic cooling ring 5 in sequence along the emergent direction of laser, the first electronic cooling ring 4 and the second electronic cooling ring 5 are annular, the outer diameters of the first electronic cooling ring 4 and the second electronic cooling ring 5 are equal to the inner diameter of the mounting cavity 12, the inner diameters of the first electronic cooling ring 4 and the second electronic cooling ring 5 are equal to the diameter of the light through hole 11, the cambered surface ends of the collimating lens 2 and the focusing lens 3 are respectively provided with a positioning ring which plays a role in limiting and positioning the collimating lens 2 and the focusing lens 3, the first electronic cooling ring 4, the collimating lens 2, the focusing lens 3 and the second electronic cooling ring 5 are embedded in the mounting cavity 12 so as to be convenient to assemble, the outer diameters of the first electronic cooling ring 4 and the second electronic cooling ring 5 are equal to the inner diameters of the mounting cavity 12, the inner diameters of the first electronic cooling ring 4 and the second electronic cooling ring 5 are not equal to the diameter of the light through hole 11, the first electronic cooling ring 4 and the second electronic cooling ring 2 are not equal to the inner diameters of the light through hole 11, the first electronic cooling ring and the first electronic cooling ring 2 and the second electronic cooling ring 2 are further equal to the laser cooling ring 2 and the laser cooling lens 2 are further enlarged, and the laser cooling lens 2 and the laser cooling efficiency is further enlarged.
Referring to fig. 6, the first electronic cooling loop 4 and the second electronic cooling loop 5 each include an external power switch 52, a temperature regulator 53 and an internal electronic quick cooling module 51, the electronic quick cooling module 51 is in a ring shape, the electronic quick cooling module 51 is embedded in the installation cavity 12, the power switch 52 is connected with an external power supply through an AC power line 54, the power switch 52 is connected with the electronic quick cooling module 51 through a DC power line 55, the electronic quick cooling module 51 is connected with the temperature regulator 53 through a temperature sensor 56, the temperature regulator 53 is connected with the power switch 52 through a regulator wiring 57, two ends of the electronic quick cooling module 51 in the axial direction are respectively a cold end and a hot end, the collimating lens 2 and the focusing lens 3 are in contact with the cold end of the corresponding electronic quick cooling module 51, the external power supply provides alternating current through an AC power line 54, the alternating current passes through the rectifying function of the power switch 52, and the temperature regulator 53 provides the direct current of a set value for the electronic quick cooling module 51 under the regulating function of the power switch 52, the temperature of the electronic quick cooling module 51 is reduced along one end in the axial direction to form a cold end, the temperature of the electronic quick cooling module 51 is connected with the temperature regulator 53 through the temperature sensor 56, the other end of the electronic quick cooling module is axially, the temperature of the electronic quick cooling module is axially, the other end is axially cooled, the temperature regulator is cooled, the temperature of the electronic quick cooling module is cooled down, the temperature is cooled down, and the temperature regulator is cooled down, and the temperature is real-timely, and the temperature is real-time, and the temperature is regulated, and the temperature is real-time, and the temperature is adjusted, and the temperature is cooled, and is cooled.
Further, referring to fig. 7, the electronic quick cooling module 51 includes a ceramic shell 510, an N-type semiconductor 514 and a P-type semiconductor 515 are disposed in the ceramic shell 510, a first copper electrode 511 is disposed at one end of the N-type semiconductor 514 and one end of the P-type semiconductor 515, two ends of the first copper electrode 511 are respectively connected with one end of the N-type semiconductor 514 and one end of the P-type semiconductor 515, a second copper electrode 512 and a third copper electrode 513 are respectively disposed at the other end of the N-type semiconductor 514 and the other end of the P-type semiconductor 515, the power switch 52 is electrically connected with the second copper electrode 512 and the third copper electrode 513 through a DC power line 55, the second copper electrode 512 forms an anode, the third copper electrode 513 forms a cathode, the ceramic shell 510 has a good heat transfer effect and is non-conductive, after the power is turned on, an electron hole pair is generated near the first copper electrode 511, the internal energy is reduced, the temperature is reduced, the electron hole pair is combined, the internal energy is increased, the temperature is increased, and the heat is released outwards, a hot end is formed, and the arrow direction in fig. 7 is the flowing direction of heat.
The machine body 1 is provided with a first water cooling cavity 13 and a second water cooling cavity 14 at the hot ends of the first electronic cooling ring 4 and the second electronic cooling ring 5, the first water cooling cavity 13 and the second water cooling cavity 14 are annular, the contact area between the first water cooling cavity 13 and the second water cooling cavity 14 and the first electronic cooling ring 4 and the second electronic cooling ring 5 is increased, the first water cooling cavity 13 and the second water cooling cavity 14 are provided with a water inlet and a water outlet, and the first water cooling cavity 13 and the second water cooling cavity 14 respectively conduct heat dissipation cooling on the hot ends of the first electronic cooling ring 4 and the second electronic cooling ring 5 and take away the heat of the hot ends of the first electronic cooling ring 4 and the second electronic cooling ring 5.
The utility model also discloses a laser cutting head comprising the optical temperature control device.
The utility model also discloses a laser processing method, which adopts the laser cutting head to process, and comprises the following steps:
step 1: setting working parameters of the first electronic cooling ring 4 and the second electronic cooling ring 5 according to the temperature of the optical lens to be controlled;
step 2: starting a laser cutting head for processing;
step 3: after the machining is completed, the laser cutting head is stopped.
Further, in step 1, when the temperature of the optical lens to be controlled is T and the currents of the first and second electronic cooling rings 4 and 5 are set to be I, the currents of the first and second electronic cooling rings 4 and 5 are adjusted according to the following relationship:
Variations and modifications to the above would be obvious to persons skilled in the art to which the utility model pertains from the foregoing description and teachings. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the utility model should be also included in the scope of the claims of the utility model. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not constitute any limitation on the utility model.
Claims (7)
1. An optical temperature control device of a laser cutting head comprises a machine body (1), wherein a light through hole (11) for laser to pass through is formed in the machine body (1), and collimating lenses (2) and focusing lenses (3) which are arranged at intervals are sequentially arranged in the machine body (1) along the emitting direction of the laser;
the optical temperature control device is characterized by comprising a first electronic cooling ring (4) and a second electronic cooling ring (5) which are arranged in the machine body (1), wherein two ends of the first electronic cooling ring (4) and the second electronic cooling ring (5) along the axial direction are respectively a cold end and a hot end, the cold end of the first electronic cooling ring (4) is in conflict with one end of the collimating lens (2), and the cold end of the second electronic cooling ring (5) is in conflict with one end of the focusing lens (3);
the two ends of the first electronic cooling ring (4) and the second electronic cooling ring (5) are respectively set to be planes, the two ends of the collimating lens (2) and the focusing lens (3) are respectively a plane end and an arc surface end, the cold end of the first electronic cooling ring (4) is abutted against the plane end of the collimating lens (2), and the cold end of the second electronic cooling ring (5) is abutted against the plane end of the focusing lens (3);
the plane end of the collimating lens (2) is arranged at one end deviating from the focusing lens (3), and the plane end of the focusing lens (3) is arranged at one end deviating from the collimating lens (2);
a mounting cavity (12) is arranged in the machine body (1), the mounting cavity is cylindrical, the inner diameter of the mounting cavity is larger than the inner diameter of the light-passing hole, the first electronic cooling ring (4), the collimating lens (2), the focusing lens (3) and the second electronic cooling ring (5) are sequentially arranged in the mounting cavity (12) along the emergent direction of laser, the outer diameters of the first electronic cooling ring (4) and the second electronic cooling ring (5) are equal to the inner diameter of the mounting cavity (12), the inner diameters of the first electronic cooling ring (4) and the second electronic cooling ring (5) are equal to the diameter of the light-transmitting hole (11), and the cambered surface ends of the collimating lens (2) and the focusing lens (3) are provided with positioning rings.
2. The optical temperature control device according to claim 1, wherein the first electronic cooling ring (4) and the second electronic cooling ring (5) each comprise an external power switch (52), a temperature regulator (53) and an internal electronic quick cooling module (51), the power switch (52) is connected with an external power supply through an AC power line (54), the power switch (52) is connected with the electronic quick cooling module (51) through a DC power line (55), the electronic quick cooling module (51) is connected with the temperature regulator (53) through a temperature sensor (56), the temperature regulator (53) is connected with the power switch (52) through a regulator wiring (57), two ends of the electronic quick cooling module (51) along the axial direction are respectively a cold end and a hot end, and the collimating lens (2) and the focusing lens (3) are abutted against the cold end of the corresponding electronic quick cooling module (51).
3. The optical temperature control device according to claim 2, wherein the electronic rapid cooling module (51) comprises a ceramic shell (510), an N-type semiconductor (514) and a P-type semiconductor (515) are arranged in the ceramic shell (510), a first copper electrode (511) is arranged at one end of the N-type semiconductor (514) and one end of the P-type semiconductor (515), two ends of the first copper electrode (511) are respectively connected with one end of the N-type semiconductor (514) and one end of the P-type semiconductor (515), a second copper electrode (512) and a third copper electrode (513) are respectively arranged at the other end of the N-type semiconductor (514) and the other end of the P-type semiconductor (515), and the power switch (52) is electrically connected with the second copper electrode (512) and the third copper electrode (513) through the DC power line (55).
4. The optical temperature control device according to claim 1, wherein the machine body (1) is provided with a first water cooling cavity (13) and a second water cooling cavity (14) at the hot ends of the first electronic cooling ring (4) and the second electronic cooling ring (5), the first water cooling cavity (13) and the second water cooling cavity (14) are all annular, and the first water cooling cavity (13) and the second water cooling cavity (14) are provided with a water inlet and a water outlet.
5. A laser cutting head comprising an optical temperature control device according to any one of claims 1 to 4.
6. A laser processing method, characterized in that the laser cutting head of claim 5 is used for processing, the laser processing method comprising the steps of:
step 1: setting working parameters of the first electronic cooling ring (4) and the second electronic cooling ring (5) according to the temperature of the optical lens to be controlled;
step 2: starting the laser cutting head for processing;
step 3: and stopping the laser cutting head after the machining is finished.
7. The laser processing method according to claim 6, wherein,
in step 1, the temperature of the optical lens to be controlled is T, and the currents of the first electron cooling ring (4) and the second electron cooling ring (5) are set to be I, and the currents of the first electron cooling ring (4) and the second electron cooling ring (5) are adjusted according to the following relationship:
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Address after: 528311 No. 4 Anye Road, Shunjiang Community Industrial Park, Beijiao Town, Shunde District, Foshan City, Guangdong Province Applicant after: Guangdong Hongshi Laser Technology Co.,Ltd. Address before: 528311 Beijiao Town, Shunde District, Foshan, Guangdong, Beijiao, 8, two Pearl River Road, industrial park, Applicant before: Guangdong Hongshi Laser Technology Co.,Ltd. |
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